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From: burkert1@platon.fmi.uni-passau.de (Klaus Burkert)
Newsgroups: comp.sys.amiga.emulations
Subject: Re: 286 bridgeboard problem
Message-ID: <1991Jun5.115926.16906@forwiss.uni-passau.de>
Date: 5 Jun 91 11:59:26 GMT
References: <4258@polari.UUCP> <97XCJ-=@irie.ais.org> <22167@cbmvax.commodore.com>
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In article <22167@cbmvax.commodore.com> drysdale@cbmvax.commodore.com (Scott Drysdale) writes:
>In article <97XCJ-=@irie.ais.org> kelson@ais.org (David Lewis) writes:
>>
>>     A friend of mine has an Amiga 2000, with a 105 meg quantum hd, and
>>a 286 bridgeboard.  He has a 45 meg pc file that he created with makeab 
>>and his access time once inside the pc is pathetically dog slow.  Has
>>anyone else had this problem? or any solutions to this problem?  any
>>help at all would be greatly appreciated.
>
>there are two things to do.  one is a hardware change which will void
>the bridgeboard's warranty and give up to 4 times more fake pc partition
>performance.  the other is to use ADDBUFFERS (use a large number, such
>as 400, for 45 meg), or similar hard disk cache software.
>
>the hardware change for the A2286 is as follows:
>
>1) lift pin 6 of U72 out of the socket.
>2) attach one end of a wire to the pin, and the other end of the wire
>   to J17A pin 30.
>
>** NOTE THAT THE ABOVE CHANGE VOIDS YOUR BRIDGEBOARD'S WARRANTY. **
>** NEITHER MYSELF NOR COMMODORE CAN ASSUME LIABILITY IF YOU DAMAGE **
>** THE BRIDGEBOARD OR THE AMIGA **
>
I've had similar problems with  my A2088 and a 15MB-File on a GVP I.
There is one easy solution without voiding warranty:
 simply throw in an additional HD for the PC-side!
After switching to an A2286 I did it with an IDE ST-1102A and it runs like
hell:
 
  CORETEST -> transfer about 1009KB/s , access-time < 19ms.

Of course you have to patch the BIOS, because there is no appropriate entry
for this drive (1024cyl, 10 head, 17 sec) and user-type is not supported.

Scott,
this hardware modification sounds interesting, I'm going to overlook and try
it with my 12MHz-boosted BB.

Ciao, Klaus

>>Internet: Kelson@ais.org
>
>  --Scotty
>-- 
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>Scott Drysdale           Software Engineer
>Commodore Amiga Inc.     UUCP {allegra|burdvax|rutgers|ihnp4}!cbmvax!drysdale
>		         PHONE - yes.
>"Have you hugged your hog today?"
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

-------------------------------------------------------------
Klaus Burkert        email: burkert1@platon.fmi.uni-passau.de
Brandweg 11          voice: +49-851/83993
D-W-8390 Passau   /  Federal Republic of Germany